springMvc跨域

1. Spring框架还提供了CorsFilter
    在这种情况下，不用使用@CrossOrigin或WebMvcConfigurer#addCorsMappings(CorsRegistry),可以在Spring Boot应用程序中声明如下的过滤器：

@Configuration
public class MyConfiguration {

    @Bean
    public FilterRegistrationBean corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration config = new CorsConfiguration();
        config.setAllowCredentials(true);
        config.addAllowedOrigin("http://domain1.com");
        config.addAllowedHeader("*");
        config.addAllowedMethod("*");
        source.registerCorsConfiguration("/**", config);
        FilterRegistrationBean bean = new FilterRegistrationBean(new CorsFilter(source));
        bean.setOrder(0);
        return bean;
    }
}

2.  全局CORS配置

   如果您正在使用Spring Boot，建议将WebMvcConfigurer bean声明如下：

@Configuration
public class MyConfiguration {

    @Bean
    public WebMvcConfigurer corsConfigurer() {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void addCorsMappings(CorsRegistry registry) {
                registry.addMapping("/**");
            }
        };
    }
}

3. 

/**
 * WebMvc配置
 */
@Configuration
public class WebConfig implements WebMvcConfigurer {
    //跨域解决
    static final String ORIGINS[] = new String[] { "GET", "POST", "PUT", "DELETE" };
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**").allowedOrigins("*").allowCredentials(true).allowedMethods(ORIGINS)
                .maxAge(3600);
    }


}